Safer water in an emergency situation.

Did you know that you can make water bacterially safe by simply putting it in a clear bottle in direct sunlight for 8 hours. This method doesn't get rid of impurities so you should be sure that you filter the water the best you can to remove as much other stuff as possible. It won't work if the Sunshine can't get through the water for dirt either. Please be advised that this is for use in an emergency situation. If you have clean safe drinking water please use it.